Jeff Master's Weather Blog Weather Underground: Wunder Blog of Jeff Masters, a good hurricane resource.

As of 8 PM tonight, here is what he says about Gustav: "Gustav will likely be a major Category 3 or 4 hurricane in the Gulf of Mexico. However, Gustav may not be able to maintain that strength all the way to landfall, if it slows down close to landfall, as expected. The GFDL is currently predicting a landfall Monday morning near the Alabama/Mississippi border as a Category 2 hurricane; the HWRF is predicting a Category 3 storm making landfall in central Louisiana, on Tuesday morning. The GFDL continues to be a day or so faster than the other models in bringing Gustav to landfall, resulting in less time for intensification. Since it is the outlier, a landfall Tuesday seems more likely."